Importing DirectAdmin made PhpMyAdmin not work while user exists

Trying to import directadmin backup.
It fails.
Phpmyadmin - Error establishing a database connection
deleting whole server i previously manually made but witch i used for importing & then works but now i need to remake what i previoulsy manually made.

This appears to be a duplicate of this issue:

https://www.virtualmin.com/node/32901

one is about error beeing made
other is about problem solution making problem with needing to remove whole user with its all other domains.